Sync with sys/i386/i386/microtime.s revision up to 1.39.
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@ -32,7 +32,7 @@
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* SUCH DAMAGE.
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*
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* from: Steve McCanne's microtime code
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* $Id: microtime.s,v 1.20 1997/12/26 20:42:33 phk Exp $
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* $Id: microtime.s,v 1.21 1997/12/28 08:16:28 kato Exp $
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*/
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#include <machine/asmacros.h>
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@ -51,7 +51,6 @@
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ENTRY(microtime)
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#if (defined(I586_CPU) || defined(I686_CPU)) && !defined(SMP)
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movl _tsc_freq, %ecx
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testl %ecx, %ecx
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je i8254_microtime
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@ -61,12 +60,9 @@ ENTRY(microtime)
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subl _tsc_bias, %eax
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mull _tsc_multiplier
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movl %edx, %eax
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popfl /* restore interrupt mask */
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jmp common_microtime
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#else
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xorl %ecx, %ecx /* clear ecx */
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#endif
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ALIGN_TEXT
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i8254_microtime:
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movb $TIMER_SEL0|TIMER_LATCH, %al /* prepare to latch */
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@ -270,10 +266,6 @@ overflow:
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shr $15, %eax
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#endif /* PC98 */
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common_microtime:
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addl _time+4, %eax /* usec += time.tv_sec */
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movl _time, %edx /* sec = time.tv_sec */
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#ifdef USE_CLOCKLOCK
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pushl %eax /* s_lock destroys %eax, %ecx */
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pushl %edx /* during profiling, %edx is also destroyed */
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@ -285,6 +277,11 @@ common_microtime:
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#endif /* USE_CLOCKLOCK */
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popfl /* restore interrupt mask */
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common_microtime:
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addl _time+4, %eax /* usec += time.tv_sec */
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movl _time, %edx /* sec = time.tv_sec */
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cmpl $1000000, %eax /* usec valid? */
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jb 1f
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subl $1000000, %eax /* adjust usec */
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